Thomco Construction Inc. 6/14/2021

a KRAZAN&ASSOCIATES,INC. KA Project No. 092-20006 DRAFT Geotechnical Engineering Investigation Everett Water Main"V" May 7,2020 Page No.2 Our e s rvices were performed in general accordance with the professional services agreement for City of Everett project UP No. 3730, dated April 2, 2020, an update to Krazan proposal number G20165WAL. The geotechnical services performed for this project generally include the following: • A geotechnical engineering investigation, including thirteen(13) soil borings to evaluate the existing pavement section as well as the subsurface soil and groundwater conditions at the site; • A site plan showing the geotechnical soil boring locations, and comprehensive soil boring logs including soil stratification and classification, and groundwater levels where applicable; • A geologic description of the area based on a review of published geologic maps and our geotechnical experience in the area; • A site description based on aerial imagery and Krazan site visits; • Recommendations for earthwork and site preparation including the suitability of on-site soils for trench backfill, placement and compaction of on-site soils, the mitigation of unsuitable soil conditions, and an evaluation of soil moisture sensitivity; • Recommendations for conventional trenching techniques including trench shoring, excavation,pipe support,and construction dewatering considerations; • Recommendations for seismic design considerations including site coefficient and ground acceleration information; • Information regarding soil corrosiveness; • Recommendations for erosion control during construction. 111 PROJECT INFORMATION Project Location and Description The City plans to install new ductile iron water pipe and abandon in-place existing cast iron pipe in three project areas: Olympic Boulevard and Ridgemont Drive, from West Mukilteo Boulevard to 4428 Ridgemont Drive; Pine Street from Hewitt Avenue to 25th Street; and Wetmore Avenue from 10th Street to 7th Street. It is our understanding that the water main line will be located within City of Everett Right-Of-Way(ROW)and easements. It is our current understanding that the new water main will include approximately 5,300 lineal feet of 8-inch diameter ductile iron water pipe. We anticipate that the water main will be installed with 36 to 48 inches of cover using standard trench excavation techniques. The project will also include removal I Krazan&Associates,Inc. Offices Serving The Western United States I